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Commit 0999f021 authored by Xin Long's avatar Xin Long Committed by David S. Miller
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sctp: check for ipv6_pinfo legal sndflow with flowlabel in sctp_v6_get_dst 



The transport with illegal flowlabel should not be allowed to send
packets. Other transport protocols already denies this.

Signed-off-by: default avatarXin Long <lucien.xin@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4be4139f

net/sctp/ipv6.c

+9 −0
Original line number Diff line number Diff line
@@ -262,6 +262,15 @@ static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, 
	if (t->flowlabel & SCTP_FLOWLABEL_SET_MASK)

		fl6->flowlabel = htonl(t->flowlabel & SCTP_FLOWLABEL_VAL_MASK);



	if (np->sndflow && (fl6->flowlabel & IPV6_FLOWLABEL_MASK)) {

		struct ip6_flowlabel *flowlabel;



		flowlabel = fl6_sock_lookup(sk, fl6->flowlabel);

		if (!flowlabel)

			goto out;

		fl6_sock_release(flowlabel);

	}



	pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr);



	if (asoc)